TV

TDA9370 Datasheet PDF – Microprocessor For TV

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Part Number: TDA9370

Function: Highly integrated “jungle IC” used in CRT television systems

Package: DIP 64 Pin Type

Manufacturer: Philips Electronics ( https://www.nxp.com/ )

Image:

TDA9370 Image

Description

The TDA9370 internal circuit mainly includes: microprocessor (CPU); image IF signal processing circuit; brightness, chrominance processing and demodulation circuit; RGB primary color signal matrix conversion circuit; black level extension, image sharpness enhancement circuit; RGB primary color selection Switch circuit; debug-free line oscillating circuit and line and field excitation pulse forming and output circuit: image state adjustment circuit.

Core Architecture Overview

  • Embedded microcontroller (CPU core)
  • Video IF processing + demodulation
  • Full analog video signal chain (luminance + chrominance)
  • RGB processing and output stage
  • Horizontal and vertical deflection control
  • On-screen display (OSD) control capability

Pinout

TDA9370 Pinout, datasheet
In the figure, the function code of each pin, the signal output/person flow direction (indicated by the arrow) are marked, and the function, voltage and resistance test data of each pin are further described in the form of a table, and the transistor type and application parameters of the TDA9370 peripheral circuit are given. Replacement model. This is a great help for overhauling the TDA9370 super chip color TV.

TDA9370 Datasheet and Circuit

TDA9370 Datasheet

Design Considerations

  • Power Supply Filtering: Critical for noise-free video
  • Grounding: Separate analog and digital grounds recommended
  • High Voltage Isolation: Careful layout near deflection circuits
  • Thermal: Moderate, but depends on surrounding circuitry
  • EMI Control: Important due to high-frequency deflection signals

Applications

  • CRT color televisions
  • CRT monitors
  • Integrated analog video display systems

Engineering Note

  • This IC represents a classic “single-chip TV solution” from the analog CRT era
  • Now largely obsolete due to transition to LCD/LED digital display systems
  • However, still relevant for repair, restoration, and legacy equipment maintenance

TDA9370 pdf

Other data sheets are available within the file: TDA9370PS, TDA9370PS/N2

LA78040 Pinout – TV, CRT Display Vertical Output IC – Sanyo

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This is one of the Display Vertical Output IC types.

Part Number: LA78040

Function: TV and CRT Display Vertical Output IC with Bus Control Support

Package: TO-220-7H Type

Manufacturer: Sanyo

See the preview image and the PDF file for more information.

Image

la78040-vertical-output

Description

The LA78040 is a vertical deflection output IC for high image quality TV and CRT displays that supports the use of a bus control system signal-processing IC. The sawtooth waveform from the bus control system signal-processing IC can directly drive the deflection yoke (including the DC component). Color TV vertical deflection system adjustment functions can be controlled over a bus system by connecting the LA78040 to a Sanyo LA768X series or LA769XX series bus control system signal-processing IC.

Key Architecture

  • Vertical deflection power amplifier
  • Direct yoke drive capability (including DC component)
  • Integrated pump-up (bootstrap) circuit
  • Thermal protection included

Core Features

  • Built-in pump-up circuit → improves output swing and efficiency
  • Capable of directly driving vertical deflection yoke
  • Compatible with bus-controlled video processors (e.g., LA76931)
  • Thermal shutdown protection for reliability
  • Supports high-quality CRT image performance

LA78040 Pinout

la78040-pinout

Function

1. Built-in pump-up circuit for low power dissipation.
2. Vertical output circuit.
3. Thermal protection circuit.

Maximum Ratings at Ta = 25°C

1. Pump-up block supply voltage (+B2 max) : 34 V
2. Output block supply voltage (+B6 max) : 70 V
3. Allowable power dissipation (Pd max) : 9 W
4. Deflection output current (I5 max) : -1.5 to +1.5 Ap-o
5. Thermal resistance (θj-c) : 3 °C /W
6. Operating temperature (Topr) : -20 to +85 °C
7. Storage temperature (Tstg) : -40 to +150 °C

LA78040 Application Circuit ( Single Power Supply )

la78040-circuit

Design Notes (Critical Points)

  • Heat sink is mandatory due to power dissipation
  • Pump-up capacitor value affects vertical amplitude
  • Ensure proper grounding to avoid vertical jitter
  • Yoke impedance must match IC capability
  • Thermal protection should not be triggered in normal operation

Advantages

  • High integration → fewer external components
  • Stable and precise vertical deflection
  • Compatible with digital bus-controlled systems
  • Built-in protection improves reliability

Typical Applications

  • CRT televisions
  • CRT monitors
  • Video display systems using analog deflection

Related / Compatible ICs

  • LA76931 (video/signal processor)
  • LA76810 / LA76818 series
  • TDA3653 / TDA8172 (alternative vertical output ICs)

LA78040 Datasheet